Single Circuit Breaker With Double Busbar, External Voltage Selection - ABB REB670 Applications Manual

Busbar protection 2.1 ansi, relion 670 series

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1MRK 505 337-UUS -

Application manual

Single circuit breaker with double busbar, external voltage selection

ANSI10000094 V1 EN

Connection of SESRSYN (25) function block in a single breaker, double

busbar arrangement with external voltage selection

In this type of arrangement no internal voltage selection is required. The voltage selection

is made by external relays typically connected according to figure 110. Suitable voltage

and VT fuse failure supervision from the two busbars are selected based on the position of

the busbar disconnectors. This means that the connections to the function block will be the

same as for the single busbar arrangement. The voltage selection parameter CBConfig is

set to No voltage sel.

SESRSYN (25)

ANSI10000094-1-en.vsd